<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box {
            display: flex;
           /*  flex-direction: row;
            flex-wrap: wrap; */
            flex-flow: row nowrap;
            justify-content: flex-start;
            align-items: flex-start;
            /* align-content: space-around; */
            height: 1000px;
            background-color: green;
        }

        .item {
            width: 200px;
            height: 200px;
            flex:1;

            border: 2px solid blue;
            text-align: center;
        }
        .item:nth-child(3){
           align-self: flex-end;
           order: -1;
        }

        
    </style>
</head>

<body>
    <div class="box">
        <div class="item">1</div>
        <div class="item">2</div>
        <div class="item">3</div>
        <div class="item">4</div>
       <!--  <div class="item">5</div> -->

    </div>
   
</body>

</html>